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Diffstat (limited to 'doc')
| -rw-r--r-- | doc/sed.texi | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/doc/sed.texi b/doc/sed.texi index 6b272ee..92bff01 100644 --- a/doc/sed.texi +++ b/doc/sed.texi @@ -307,6 +307,31 @@ directory (provided the directory already exists). If no extension is supplied, the original file is overwritten without making a backup. +Because @option{-i} takes an optional argument, it should +not be followed by other short options: +@table @code +@item sed -Ei '...' FILE +Same as @option{-E -i} with no backup suffix - @file{FILE} will be +edited in-place without creating a backup. + +@item sed -iE '...' FILE +This is equivalent to @option{--in-place=E}, creating @file{FILEE} as backup +of @file{FILE} +@end table + +Be cautious of using @option{-n} with @option{-i}: the former disables +automatic printing of lines and the latter changes the file in-place +without a backup. Used carelessly (and without an explicit @code{p} command), +the output file will be empty: +@codequotebacktick on +@codequoteundirected on +@example +# WRONG USAGE: 'FILE' will be truncated. +sed -ni 's/foo/bar/' FILE +@end example +@codequotebacktick off +@codequoteundirected off + @item -l @var{N} @itemx --line-length=@var{N} @opindex -l |